Inspired by concepts of monumentality and materiality, this article discusses the results of the first microstratigraphic study conducted on the monumental buildings of the pre- and early historic site of Arslantepe (Malatya, Turkey). The earthen surfaces (floors and fixtures) of three monumental buildings—two belonging to the 4th and one to the 1st millennium BCE—were analysed by means of micromorphology, sometimes in combination with chemical spot-tests. Sampling strategies were adapted to these contexts, which are part of an open-air museum and required minimally invasive procedures. The results show a recycling of tell-construction material and the use of selected plasters for specific features, as well as the different maintenance practices and activities traced in apparently homogeneous surfaces. This revealed a multifaceted picture of how these monuments were experienced and given meaning to. Ultimately, by following a deposit-oriented approach, monuments go from representing mere embodiments of ideology and inequality to being understood as the multi-layered outcome of practices and different forms of material engagement with the built environment.